Swim fin



FIG. 1 is a top perspective view of a swim fin according to our new design;

FIG. 2 is another top perspective view of the swim fin;

FIG. 3 is a bottom perspective view of the swim fin;

FIG. 4 is a bottom view of the swim fin;

FIG. 5 is a top view of the swim fin;

FIG. 6 is a first side view of the swim fin;

FIG. 7 is a second side view of the swim fin;

FIG. 8 is a top view of the rear portion of the swim fin;

FIG. 9 is a bottom view of the rear portion of the swim fin; and,

FIG. 10 is a cross-sectional view taken along the line 10-10. 

CLAIM The ornamental design for a swim fin, as shown and described. 